This model is a non-separable type of bearing system whose inner ring is fixed to the side plates.
Since the circumference of the outer ring is spherically ground, it helps lighten a biased load (symbol R). (Model number of the type attached with seals is NAST-UUR.)

Model No. Main dimensions Basic load rating Detail specifications CAD Dimensional drawing Inner  diameter di Inscribed bore  diameter dr Outer  diameter D B C Dynamic rating C Static rating C0 2D (DXF) 3D mm mm mm mm mm kN kN NART 5R 5 — 16 12 11 2.84 2.65 NART 6R 6 — 19 12 11 3.33 3.35 NART 8R 8 — 24 15 14 5.68 5.89 NART 10R 10 — 30 15 14 7.94 7.59 NART 12R 12 — 32 15 14 8.53 8.44 NART 15R 15 — 35 19 18 13.7 16.4 NART 17R 17 — 40 21 20 17.4 19.3 NART 20R 20 — 47 25 24 22.9 30.6 NART 25R 25 — 52 25 24 24.6 33.3 NART 30R 30 — 62 29 28 33.4 51.4 NART 35R 35 — 72 29 28 35.5 57.3 NART 40R 40 — 80 32 30 44.6 81.4 NART 45R 45 — 85 32 30 46.6 88.6 NART 50R 50 — 90 32 30 48.3 95.7